Airsoft Gearbox Upgrade & Replacement Parts

Airsoft Megastore carries all of your airsoft AEG gearbox parts and upgrades, helping you to keep your airsoft AEG’s gearbox running to its maximum potential! We carry internal gearbox replacement and upgrade parts from leading airsoft manufacturers such as Systema, JBU, SHS, G&G, Element and many more. Keep your AEG gearbox running smoothly with the best replacement parts and upgrades, available for the lowest prices on the market at Airsoft Megastore!

45 Day Warranty

110% Lowest Price Guarantee

Best in Class Customer Service

The rifle I purchased came unable to work, I was able to send the item back and they sent me a band new one with no cost me. Also, their tech service was great as well!!
Jasoncampbell, USA

Great customer service, really worked with me.

The rifle I purchased came unable to work, I was able to send the item back and they sent me a band new one with no cost me. Also, their tech service was great as well!!
Jasoncampbell, USA

I love the pro gunbuilder by golden eagle!

The gunbuilder was very useful and made it easy for me to buy my first mid/high spec gun for just about $300. It gave me comfort in that i can get more parts to switch out at a later time if i wish to change anything about my rifle and that there will be compatible parts for any modifications i choose to do on it. The gun came in full working order and the hopup was even adjusted to be perfect right out of the box. I could easily hit targets over 150ft away constantly.
Johnmstopka, USA

Best Site for Airsofting Gear and Guns

Every time I purchase from Airsoft Megastore I am very satisfied with my order. It arrives on time and the deals are excellent. AMS is probably my go to place for airsofting equipment, especially when I'm itching to add another gun to my collection!
macawilliams12, USA

Awesome!

Mega store has been great I've been usen them for 3 years now never no problems. Great products and service
fbfzh2005, USA

On point

Shipment was fast and complete technician I spoke to was very helpful. Helped me with problems I was having with my other guns. Very knowledgable with your products.
sjstarheel, USA

I love Airsoft Megastore. My stuff is always on time and is always 5 star. This is the most honest and reliable place to buy airsoft guns of the internet!
sgodwin2345, USA